Boeing 737MAX age began in US.

Boeing 737MAX’s new age began in US with Southwest Airlines. The airline took delivery of its first 737MAX on 24 September 2017. The airline has 191 737 MAX jets on order that includes 161 MAX-8s and 30 MAX-7s.
Southwest is the second largest MAX customer in the world after Indonesian Lion Air which ordered 201 737 MAXs and 29 Next-Generation 737-900s

According to Boeing, every MAX Airplane features the Boeing’s new ‘Sky Interior’,highlighted by modern sculpted sidewalls and window reveals.
The Split Scimitar winglets design is unique, having an airfoil pointing downwards, result in cutting fuel costs by 2 per cent and in overall winglet-related savings up to $US200 million.

The 737MAX is the fastest selling aircraft in Boeing’s history. To date, it has received 3900 firm orders from 91 customers.